Tap Tempo Delay with the "Effects Loop Mod"?

[sevenisthenumber]

Does anyone know of a pedal that has tap tempo that can be modded for the "effects loop" mod? (like the dd3)

[Processaurus]

That would be a digital delay with an analog feedback path, not many of them with tap tempo.  The Trex digital delay might have that, but it is too expensive.  How about making a feedback loop pedal (with a way to blend in the dry signal), and in the loop, set a regular tap tempo digital delay to 100% wet and minimum repeats, and whatever effects you'd want on the delay?

Or, learn some programming and make a microprocessor do tap tempo control for the clock on a DD3!

[sevenisthenumber]

wow. sounds hard!

[Processaurus]

The first option is easy!
here's a super simple feedback looper (outrageous fun in its own right):
http://experimentalistsanonymous.com/board/viewtopic.php?t=134

You could splice the feedback pot into one of the circuits around here that people have shared to do clean blend with a pedal in an effects loop.  The only trick is to make sure the "send" output impedance isn't too low (ie connected directly to an opamp, a series resistor would be necessary in that case), because that would kill the feedback.  Also the clean signal to be blended would need a separate buffer from the one going to "send", so that the feedback doesn't get mixed into the clean side.

Here's the ticket:


So the feedback mod would be a 500K pot or so, set as a variable resistor from the return jack to the send jack.  You'd need to add a series resistor for the reason above, in between the 10uF cap and the send jack (where the feedback pot is hooked to).  I'd guess a series 22K to 100K resistor or so would stop the opamp (OPd) from loading the weak signal coming from the feedback pot down too much.